feat: add toolName to AppActivity payload and audit allowlist domains

- AppActivity.Payload.toolName (String) — MCP tool name in admin app
  activity payloads. Additive, no breaking changes.
- LogsResponse.Details.mcpServerAllowlistDomains (List<String>) — MCP
  server allowlist domain URLs. Additive; verified as a list of strings.

Co-Authored-By: Claude <svc-devxp-claude@slack-corp.com>

Author: zimeg

slack-api-client/src/main/java/com/slack/api/audit/response/LogsResponse.java

@@ -452,6 +452,7 @@ public static class Details {
         private String uri;
         private String executorId;
         private String skillId;
+        private List<String> mcpServerAllowlistDomains;
     }
 
     @Data

slack-api-model/src/main/java/com/slack/api/model/admin/AppActivity.java

@@ -57,6 +57,8 @@ public static class Payload {
         private String details; // "{\"expression\":\"\",\"expression_attributes\":{},\"expression_values\":{},\"limit\":1000,\"cursor\":\"\"}"
         private String requestType; // "query"
         private String datastoreName;
+
+        private String toolName;
     }
 
     @Data